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' (No Model.) 2 Sheets-Sneet-1. 0. 's. HOOD I RADIATOR FOR HOT AIRFURNACES. 7 No. 293,025. Patented Feb. 5, 1884.

V As fimodl v I N PETERS. PMXfl-lilllogrmphon wmhinglnn. 04 a (NdM9631.)

'RADIATOR FOR HOT AIRI'URNAGES.

' PatentedIebQB,1884.

N. FEI'ERS. Plwwlithogrwmm Washington, D. c.

zen of the United States, residing atfOorning,

, latter will open the damper and the closing of furnace, and, passingover the outer walls of the fire-pot, passes up through the narrow fluesSpecification.

in separate thin volumes, to obtain a large extent of radiating-surfacesin direct contact pressure of the gas is sufficienttoopen the circularfines from the combnstionehamber,

f1 f 'Ti S ATES PA EN I crnus s. noon, or'conNI'Ne, NEW Yonk.

"-RAmATo FOR HJOT-AIR FURNACES.

SPECIFICATION forming part of LettersPatent No. 293,025, dated February5, 1884 Application filell eptcinhcr 25, max. (No modclJ To ltZZ/zuhomzit may concern.- r r 4 Be it known that I, .Ovnes 8.11001), a .citiinthe county of Steuben and State of New York, have invented new an duseful Imp rove ments in Radiators .for Hot-Air Furnaces andHeating-Stoves, of which the ibll owing is a The; object of my inventionis to produce a radiator for hot-air furnaces and stoves adapted todistribute, thewaste products of combustion with the air to be heated,entering the heating-I spaces. in thin volumes, and to obtain a direct.draft from the combustion-chamber when the valves automatically. 7 Theradiatoris mount ed upon the fire-pot, and is constructed with one, two,or more circular fines surrounding the combustion-chamber, each havingdirect communication with the fire-pot at substantially the same point,each fiue having substantially the same exit, each fine divided by ahorizontal partition, and eachflne giving out'its heat in direct contactwith the air to be heated. A damper is arranged horizontally in avertical central chamber, and divides it to form the upper part of thecombustionchamber and a top exit-chamber, and the han dle of this damperis so arranged in relation to the furnace-door that the opening of thethe door will allow the damper to close of itself, thus allowing the gasand smoke to pass off through the valved opening directly into the topexitchamber whenthe furnace-door is open. The products of combustionenter the and, passing around beneath the horizontal partition-plate toapoint diametrically opposite, return above the partition-plate and passinto the exit'chamber at a point just above thatat whichthey enteredthesaid circular fines, distributing the heat evenly through the wallsto the air which enters at the base of the formed by the heatingwallsinto the inclosingcase, whence it passes through the conductingpipes tothe apartmentsto be heated.

2 Referring to the accompanying. drawings,

Figure 1 represents a vertical section of a hot air furnace embracing myinvention; Fig.2, a horizontal section taken on the line w athrough thelower flues of the radiator; Fig. ,3, a similar section taken on, theline 51 3 through the upper or return fines of the radiator; Fig. 4, avertical. cross-section of the radiator on the line 2 2 of Fig. 2; andFig. 5, a view of the radiator, showing the relation. of itsdamper-handle to the feed-door.

, My radiator is adapted for use with fnrnaces, heating-drums, andstoves, and is de-' The radiator consists of one, two, or moreconcentric flues, of a suitable depth and width,

separated by an intervening space, E, and it has a vertical centralchamber, F, directly above and opening into the fire-pot. Horizontalpartitions G divide the concentric fines,

and a horizontal damper, H, divides the vertical central chamber, F, tothe top of which the smoke-pipe connects. The inner concentric fiue, B,opensinto the combustion-chamber below the bottom of the radiator by theopenings a a in the bottom plate of the radiator, which,by means ofshort pipes-or collars b b,

connect with openings a a in a dome, I, upon which the radiator isdirectly mounted, the

said domebeing mountedupon the fire-pot and forming thercombustion-chamber. The outer concentric flue, 0, opens into thevertical centralichamber, F, by awall-opening, 0, therein beneath thedamper, which opening 0 also communicates with the open ends 0 of the ininer fine, B. a The vertical walls (I d, crossing the interveningcold-air spaces, E, form a cross fine, J, which opens direct into thecombustion-chamber and into the concentric fines, so that'bothconcentricfines open into the combustion-chamber at substantially the same pointbelow the horizontal partition. at the back of the radiator, as shown inFig. 2. The

horizontal partition G of the inner concentric flue, B, is open at K ata point diametrically opposite the wall-opening c, and at this point Kthe inner concentric fine, B, below the partition G, opens into theconcentric, iine B above said partition, which upper flue, 13, I suchpressure, the damper closing as soon as opens into a vertical centralchamber, F, by a wall-opening, e, and the cross-flue J at a point abovethe damper directly over the lower back wall-opening, c, of the centralflue. The horizontal partition G of the outer concentric flue, O, isopen at L at the front of the radiator, and at this point L the outerconcentric fine, 0, below the partition G' opens into the concentricflue 0 above said partition, which upper flue, O, opensinto the verticalchamber F by the wall-opening e. The vercal walls at d, which cross theintervening coldair spaces, E, form a cross-flue, J, which opens directinto the top exit-chamber and into the concentric flues, so that bothconcentric fines open into the central top exit-chamber at substantiallythe same point above the damper of the central flue. By thisconstruction the products of combustion pass from the combustionchamberinto the lower crossflue, J, and, entering the concentric flueswhichopen thereimpass around both sides of the radiator to the front thereof,and, risingthrough the opening K, pass back to the same point above thepartitions G into the top cross-flue, J, and into the top centralchamber, F, which has a top central opening, over which the smoke-pipeconnects. As the radiator is inclosed by the outer casing or jacket,leaving a space all around the radiator, the cold air entering at thebottom of the jacket rises in the spaces between the concen- 1 of adirect vertical draft from the combustionchamber, andthus allows the useof soft coal,

which is an important matter in a heatingfurnace. The damper is weightedon one side at H, and is thereby made self-closing, while its handle Mpasses through the radiator just above the feed-door N, and is bent orcurved downward in front thereof in such manner that the opening of thefeed-door will bring its upper edge against the depending curved handle,and raisin g it thereby open the damp er, As the damper-handle is notattached to the door, the damper can be opened and held open whendesired without opening the door.

Instead of weighting the damper, the curved or bent handle thereof maybe weighted.

Referring to the draft of the furnace, I propose to make the fluessufficiently large to give the required indirect draft for burning softcoal, while in case of an overcharge of gas-in the combustion-chamberthe pressure caused thereby will lift and open the damper by reason ofits being pivoted to one side of the center, and thus give a directdraft to relieve the undue pressure is relieved.

The cold-air induction-pipe may be connected with the casing at anysuitable point.

The state of the art shows that much has been done in heating-drums forstoves and'in' radiators for hot-air furnaces in which concentricfire-fines receive and discharge the products of combustion, and giveout their heat in intervening open spaces for heating air passingthrough said spaces in contact with the walls of said fire-fines, and myinvention does not broadly comprehend such a thing,

but only the matters of improvement to which the claims are speciallydirected, and which consists, essentially, in using one or moreconcentric flues, each divided into an upper and a lower communicatingpassage by a horizontal purpose stated.

I claim 1. The radiator or heater embracing two or more concentricflre-fl'ucs divided horizontally, the vertical central chamber, a damperfor dividing said chamber, a cross-flue opening into the lower part ofsaid chamber, communicating with the lower concentric iire-flues at therear side of said heater, a cross-flue opening into the upper eXit partof said central chamber, communicating with the upper concentricfire-flues, and open air-spaces between the said concentric fire-flues,substantially as described, for the purpose set forth.

IIO

scribed, of a self-closing damper arranged to divide said vertical flue,having an outside bent or curved handle, and the feed-door in the casingof the outer concentric flue, arranged to press against and turn saidhandle to open the damper in opening said door, subopen concentricair-heating spaces, the said 1o concentric fire-fines openinginto thesaid crossflues and into the said central rising and exit chambers atpoints directly over each other, substantially as described.

6. The combination, in a radiator, of the central rising and exitchambers, F F, one or more separate concentric fire-flues dividedhorizontally, and communicating by openings in said divisions, thecross-fines J J, communicating with said separate concentric flues andthe said central chambers, and the open air-heating spaces, with adamper dividing the said central chambers, adapted to be opened by thepressure of the gas in the combustion-chamber, and to closeautomatically upon the relief of said pressure, substantially asdescribed.

7, An air-heater for stoves and furnaces, having one or more separateconcentric fireflues divided horizontally, a'central rising and exitchamber, a damper dividing said central chamber in line horizontallywith the fire-flue divisions, and one or more open air-heating spacesbetween the said fire-fines, the latter receiving the products ofcombustion through an opening in said central rising chamber beneath itsdividingdamper and discharging them through an opening in said centralexitchamber above said damper, both the receiving and dischargingopenings being onthe same side of said central chamber, andcommunicating with the said fire-fines by .openings in theirdivision-plates, substantially as herein set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

CYRUS S. HOOD.

\Vitnesses:

ED. H001), F. A. WILLrAMs.

